<?
if(!isset($_GET['hash'])){
echo "GIEF JE HASH!";
}else{
?>
<form action="mobi_contacts.php?hash=<? echo $_GET['hash']; ?>" method="POST">
    netwerk:<input type="text" name="network" value="" /><br/>
    netwerk_user_id:<input type="text" name="network_user_id" value="" /><br/>
    data:<input type="text" name="data" /><br/>
    <input type="submit" />
</form>
<?
}
?>